Home / 21,231.54-29,307.69-14,155.38

Finding the Fourth Proportional to 21,231.54, 29,307.69 and 14,155.38

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Solution

The fourth proportional to 21,231.54, 29,307.69 and 14,155.38 is: 19,539.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.54 : 29,307.69 = 14,155.38 : x
  2. Step 2: Convert to fraction form
    21,231.54/29,307.69 = 14,155.38/x
  3. Step 3: Cross multiply
    21,231.54x = 29,307.69 × 14,155.38
  4. Step 4: Simplify right side
    21,231.54x = 414,861,488.87
  5. Step 5: Solve for x
    x = 414,861,488.87/21,231.54
  6. Step 6: Final answer
    x = 19,539.87

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Half scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.